It is often most reasonable to add an extra SIM to your existing data plan. It is often $10 - $15/month to add data lines that share your existing data bucket.
A bot typically uses less than 10MB/month
If you have more than one bot, you should consider plans from Google Fi or Three UK.
Google Fi (https://fi.google.com) is $20 to start but that amount entitles you to have between 1 to 5 devices at not additional cost. You get one primary SIM (called Talk/Text/Data) and then order up to 4 Data Only SIMs. So, if you have more than 1 bot, it starts to make financial sense. We have had good experience with roaming internationally with Google Fi. You can also tie multiple accounts together and get even bigger discounts. For example, 6 accounts tied together would cost $95 and would get you a total of 30 SIMs, which works out to $3.16/month/bot. You can also pause the service for up to 3 months.
NOTE: You can only order Google Fi in the US. That being said, if you rent one of our bots, you can ask that we include a Google Fi SIM.
Three UK has a consumption service where you can buy 12months/12GB for $45 or 3months/3GB for $18.
NOTE: In some countries we have seem problems with these SIMs struggling to get a data connection when roaming. You often have to manually set the APN for the roaming partners network
Since the bots don't consume much data, those plans work out to between $4/bot/month and $6/bot/month.
Here are links to those plans:
-12 months of 12GB https://www.amazon.com/gp/product/B01CMD4VKC
-3 months or 3GB https://www.amazon.com/gp/product/B006H7BKXG/